diff --git a/gui/dot-config/hypr/hyprland.conf b/gui/dot-config/hypr/hyprland.conf
index 2a81b93..d1c966c 100644
--- a/gui/dot-config/hypr/hyprland.conf
+++ b/gui/dot-config/hypr/hyprland.conf
@@ -242,9 +242,10 @@ windowrulev2 = float, title:(Add)
 windowrulev2 = size 450 450, class:(Gnuplot)
 windowrulev2 = move 100 203, class:(Gnuplot)
 
-windowrulev2 = float, class:(qalculate-qt)
-windowrulev2 = move 700 200, class:(qalculate-qt)
-windowrulev2 = size 700 700, class:(qalculate-qt)
+# Overwrite mechanics
+windowrulev2 = float, class:(thunderbird)
+windowrulev2 = tile, initialTitle:(Mozilla Thunderbird)
+
 #windowrulev2 = tile, class:(sioyek)
 windowrulev2 = float, title:(Select Document)
 windowrulev2 = float, class:(Nextcloud)